Relay.



PATBNTED JUNE 12, 1906.

R. H. MANSON.

RELAY.

rumanos FILED muas.1an4.

2 SHEETS-SHEET L n. H. MANSON. RELAY.

LPPLIQATIOH FILED HAYES, 1904.

PATENTBD JUNE 12, 1906.

UNITED STATES PATENT OFFICE.

RAY H. MANSON, OF ELYRIA, OHIO, ASSIGNOR TO THE DEAN ELECTRIC (JOMPANY, OF ELYRA, OHIO, A CORPORATION OF OHlO.

RELAY.

Specification of Letters Patent.

Patented June 12, 1908.

Application iiled May 25. 1904. Serial No. 209,815.

4to those-in w 'ch the armature o the actuating-magnet acts upon springs or pivoted contacts to 'make and break connections,

without itself being necessarily included any, circuit thus formed. In such relays 1t has become standard practice to fasten the vzontal ,portion will engage the' springs or someoneof them.` v When such an armature is sgwung to and fro by the attraction of the clectroxnagnct-pole and its release, the conneoted'spring or sprin s will be lifted and lowered to alter the re ations in the group. Such relays have come into general use in telephone practice as line and cut-oli relays, and as such they are usually mounted on racks which have extended strips to which the relays are screwed or bolted end on. The amount of clearance between successive re lays on a rack is usually small of necessity, and hence the trouble men and ins ectors can only get access to the ends thereo for ins ection, adjustment, and repairs. Hereto ore this has been the cause of frequent complaint, because the contacts between some of the pairs of spnings 1n the ronps on the relays were not visible from t e end the armature interfering with a direct view.' As between a single pair of springs the problem solved itself, because the-armature if made straight on theV upper en d lay beneath the pair, out of the line of s1gli`t; but with the groups frequently cm loyed this 1 s not so.

It is thc purpose o my mventlcn to provide such an `arrangement of the armature and contact-springs in connection with the structure of a relay that the contacts will all be exposed for inspection and repair, that the contacts will be positive and exact both as to their touch and as to their time of touching,

' and that the full advantage due to the use of 5 5 springs ma be realized by emplo ing their wholelengt or a large part thereo in operation, gaining in resilience thereby and reducing the liability to deterioration by setting. These and other features of In invention, to 6o be more particularly describe in the specification, are illustrated in the accompanying drawings, in which- Figure i is a side elevation of a com lte relay. iig. 2 is an enlarged View' "o 'the 155A right-hand upper portion thereof, showin a modified arrangement of the stop-post. g.

3 shows four arrangements of t e insulation between the lifting-pin and the armature. Figs. 4, 5, and 6 are detail views showing a 7o modified form of lifting connection between the intermediate spring and the armature. Figs. 7, 8, and 9 are similar views of another modification. Figs. 10, 11,4ind 12 illustrate astill furthermodlfication. Figs. 13, 14, 15, and 16 show in detail another form of intermediate spring.

Referring to Fig. lof the drawings, a i ndicates the relay-magnet coil, having a. central core projecting slightly from the front end 8o thereof and a screw-threaded extension c at the rear, by which the relay is secured to the usual rack or trame. An angular soft-iron bar d, mounted on the screw-threaded core end, overlies the magnet and orinsthe frame 8 5 thereof for completing the magnetic circuit and also for supporting the other elements of the relay. The forward end of said bar d is provided with two laterally-projectn ivotpins d', upon which is loosely and Il tably 9o mounted the armature by means of two vdepending lugs or ears e, having open slots engaging said pivot-pins. The armature is generally rectangular in side elevation, having a depending member e oo erating with the pole b and a horizontal en e' e'xtendrtg rearwardly along frame d. Mounted be lawsonY insulating-blocks i, secured to the: frame d by means of screws j, are contacts rings, preferably three in number, and inloo icated yreierencedetters f, g, and h, respectively, which Yextend longitudinally of said bar and substantially parallel there with, and the ends of said springs adjacent to the forward end yof the relay are provided 1o 5 with contact-points o, p, q, and r, which by reason of their locationare in plain sight and are readily accessible for adjustment and rel, riveted to spring g, passin pair. Loosel mounted on the frame d-is a stop-post k, ormed of a cylindrical section of insulating material having a reduced upper portion k', which passes through registering o enin s in s rings h and g and abuts against t e un er si e of sprin Said springsf, g, and h have a downward set, tendin to move them toward the bar d, and the ownward movement of spring h is limited' by the shoulder formed by the larger lower portion of post k, and the correspondin movement of the u per spring f --is restraine by the upper en of section k. The intermediate spring g rests with its contact oint q engag-ing contact r on spring h, `a y in order to isengage these contacts and establish cony' nection between contact o on spring f and contact pV on spring g the intermediate spring g is `ovided with a projection extending in the path of movement of the end of the armature-section e', so that as the Vlatter rises when the armature is attracted it engages the projection and lifts the free -end of spring g?. n the particular orm of relay shown in ig. 1 this projection takes the form of a pin through a hole in spring h and engaging a lock of insulation fm on the armature end. Several modified modes of applying the insulation between the liting-A in and the amature are shown in Fig. 3 andliire so clearl illustrated as to require no particular description.

It is to be particularly observed that all of the movable parts of the relay that are susceptible of accidental derangementf-namely, the contact-points of the springs and the armature-are located at the forward part of therela where they are clearly visibleI and accessi le to the erson having charge of l the installation, and) because of this espeE cially advantageous arrangement the parts ma be inspected, adjusted, and repaired wit out removingr-the rely from 'the su porting rack or aine. uithermore, t e arrangement of the lifting-pin Z on #the iniddle spring secures a direct and ositive action between the armature and sai s ring witihout interfering with the view of t e contactoints. The insulation stop-,post 7c serves to old the upper and lower springs intheir nor l mal position and also prevenl the middle sprin from accidentally swing' glenough'to one side to allow the pin 'lto come in Contact with the lower s prin The iloos'e' pivo'tal connection between t e armature and the magnetframe ermits 'the A'l'oriner'to 'be readily removed. n Fig.l 2 ajprdferred arrangement of the stopest lc4 is illustrated, said gest being 'locate -nearfthe'forward end `di ame d and having a .reduced 'lowerF ortion which passes throu 'h an opening in t efhorizontal member e o the armature and an .interniediate swell or flange lc, which serves as a detent to prevcntthe armature'rom being i accidentally displaced from its pivots or and particularly referred lifted into contact with the lower spring la The armature may readily bc reiiioved,how ever, by lifting the group of springs and post lc suflicient to allow the lugs e to clear the pivotins d.

In t e form illustrated in Figs. 4, 5, and 6 the springs f, g, and h are somewhat shorter than those previously described, but are still brought sufiiciently far forward to permit them to be clearly seen and easil reached from the front. Also in this form ifting-pin lis replaced by the depending end of spring said end being bent to engage t e insulating-block t on the armature end and having its central portion cut away at g4 to leave a free sight-opening to contacts q and r. The armature is pivoted in this case to a forwardlyprojectling pin d on the frame d, which pm engages an orifice in the de ending armature member e. Another form o the lifting connection between intermediate spring and the armature end is that shown in gs. 7, 8, and 9, in which the forward end o' the s ring g has stamped out of it a U- s'haped s ot, which permits the end to be bent over a central tongue, carrying contactspoints p and g and also to embrace the lower contact-sprin h. The extreme end of spring g is bentbac' horizontall to form a toot enga i insu-lation t on t e armature en L shown in Figs. 1.0, il, and l2, the spi'in pb is carried beyond the 'ends of springs f .and

and is 'bent downward and fbaclrward, as shown at 4y, to .engage insulation t on the armature, by,rneans .of which said spring g is lifted. To give free and ready access to contact-points gend r, the degpendin end of said spring g is provided an orli ce g in line with `said contact-points.

I'The construction showin in Figs. 13, 14, '15, land '16 is substantially similar to :that shofwn i Figs.'7,8.,jand'9,withthis exception: The spring h is provided with notches h2 on its sides, ada ted to prevent accidental engage- 'nient of t e springs as :the middle spring g t moves u war In ad tion to the particular Aat'ivanta es inherent in the generic structure 'orf 'the re ay to above, it may be mentioned 'that "the lo armature-springs, with 'the 'lifting effect oft earmature applied at an intermediate point, ,give an increased contactressure 'for a ,given relatively small air-gap etween the armature and Athe pdleface, thereby reducing an 'increase in the sensitiveness o the relay, asthe lleverage on the springs .varies indirect proportion to 'the magnetic; ull on ftlie iarmatine, and the armature-,pu l vaiesiiiversdlyas thesguare of the length of the aira 'Havingthus descriemyinventien, what I claim, and 'dhsire toisecure .by Letters Patent, is

1. relay comprising anielectromagnet, an armature pivoted thereto, contact memble contact-points near the front end of the' bers secured thereto, one of which is provided l with a depending ortion forming an open foot extending in t e path of said armature, and contact-points visible through the opening in said foot.

2. A relay comprising an electromagnet, an armature ivoted thereto, contact members secured t ereto, one of which is provided with e depending extension forming an open foot extending in the path of movement of said armature, contact-points visible through' said open foot, and a stop-post removebly mounted on the magnet and adapted to support two of seid springs.

3. A relay comprising an electromagnet, en angular amature lvoted thereon and contact-springs exten ing longitudinally of said magnet and having visible and accessisad magnet and having magnet, the intermediate contact-spring havzo ing an open depending portion at its forward end ektending in the path of movement of said armature, substantially as described.

4. A relay comprising an electromagnet, an angular armature plvoted thereon, and contact-springs extending longitudinally of visible and accessible contact-points neer the front end of the magnet, the intermediate contact-springs having a depending member extending in the path of movement of said armature.

In testimony whereof I have ai'lixed my signature in presence of two witnesses.

RAY H. MANSON.

Witnesses:

F. M. BABcocK, S. A. BEYLAND. 

